Apparatus for machining coke oven door jambs

ABSTRACT

Described is a portable machining apparatus especially suitable for conditioning coke oven door jambs. The apparatus of the invention is adapted to fit in the frame of a coke oven door in place of the door in a position closely adjacent to the door jambs. The apparatus includes an elongated housing having a motor with a cutter connected therewith disposed for longitudinal movement along the housing. The cutter projects an adjustable distance outwardly of the housing so that the cutter is in peripheral engagement with the coke oven door jambs. The motor and cutter are moved longitudinally of the housing by means of screw shafts which are threadingly engaged by the motor case. In normal operation, the motor rotates the cutter as the motorcutter unit moves longitudinally of the housing so that both door jambs are conditioned simultaneously.

United States Patent [72] lnventor Leonard F. Harris Provo, Utah [21] Appl. No. 823,106 [22] Filed May 8, 1969 [45] Patented 'Jan. 26, 1971 [73] Assignee United States Steel Corporation a corporation of Delaware [54] APPARATUS FOR MACHINING COKE OVEN DOOR J AMBS 6 Claims, 9 Drawing Figs.

[52] US. Cl. 90/12, 90/15 [51] Int. Cl B23c 1/20, B2 3c 3/00 [50] Field of Search 90/15, 12, 164, 171; 51/180; 77/2 [56] References Cited UNITED STATES PATENTS 1,215,822 2/1917 Leu 90/12X Primary ExaminerGil Weidenfeld AttorneyDonald S. Ferito ABSTRACT: Described is a portable machining apparatus especially suitable for conditioning coke oven door jambs. The apparatus of the invention is adapted to fit in the frame of a coke oven door in place of the door in a position closely adjacent to the door jambs. The apparatus includes an elongated housing having a motor with a cutter connected therewith disposed for longitudinal movement along the housing. The cutter projects an adjustable distance outwardly of the housing so that the cutter is in peripheral engagement with the coke oven door jambs. The motor and cutter are moved longitudinally of the housing by means of screw shafts which are threadingly engaged by the motor case. In normal operation, the motor rotates the cutter as the motor-cutter unit moves longitudinally of the housing so that both door jambs are conditioned simultaneously.

'PATENIEnJAnaslan I 3,557,659

INVENTOR LEONARD E HARRIS M ,4? JM Attorney PATENTEBJANZBIHYI 3.557559 sum 3 0F 3 FIG 5 INVENTOR LEONARD E HARRIS Altar/ray thexinvention;

door hooks of a convention door-extracting machine.

metal door jambs.

' BACKGROUNDOF THE mvamiou coke oven door-jambs are usually: made ofcast iron and are bolted in thecoke oven door opening in Mixed position. 'Dur- 7 ing the ope'ra'ting life ofa coke oven, the door'jambsbecome warped and a depositof carbonaceous material builds upon the seats or'faces' of a'the'door jambs. When-thiseondition occurs, the coke oven door cannotbefprope'rly seatedin sealing relation with the door. jambs. With the door imperfectly seated, gases escapefrom the coke .oven-duringcoking operationsand cause objectionable smokeand fumes to be emitted into the atmosphere.

Prior tomy inventionwhen the coke ovendoor jambs so deteriorated that gastight seating of the coke oven door therewithin was impossible, the {door jambs were replaced with new ones. This, of course, resulted in excessivedown time for the coke oven and increased operating costs.

It is,.accordingly, the primary object ofmy i'nventionto provide a portablemetal-working'apparatus which'is eminently suitable for use in machining and reconditioning coke oven door jambs insltu .andthus eliminate the need for discarding and replacing warped and caked coke oven door jambs and greatly reduce coke oven operation interruptions.

It is morespeeific object of my inventionto provide an apparat'us of the character'setforthby-the above statement of object which consistsof an elongated housing having one substantially open side; which housing is adapted to be positioned with its-open side closely adjacent a cokeovendoor frame when the doorhas'beenremoved therefrom; a motoracase disposed for sliding movement'longitudinally invthe housing; screw shaft means for driving the rnotorcase :along the housing; a motor mountedinthecase andhavinga rotary cutter 'connected"therewith and driven thereby, "the cutter being adapted toengage with its peripherywth'espacedjambs of the door frame adjacent-which the housing is positioned.

These and other objects will become more apparent after referring to the following'speeiiications and attached drawing it in which:

BRIEF DESCRIPTION OF PI-IE DRAWING "FIG. I is a front elevationalviewof theapparatus of-the invention;

FIG. 2 is asideelevationalview of FIG. 1; FIG. 3 is a rearelevational view of-FIGLI;

FIG.4.is anenla'rgedcross-sectional viewof the housing 0 the invention takenthroughthecutterunit element;

"FIGJS'is a plan view ofthe motor shroudof the apparatus of 'FIG. 6 is 1 a substantially diagrammatic :eross-sectionalview iparatus ofthe invention;

"showingthe:apparatusofthe inventiommounted in atcoke 'oven door frame: in machiningposition;

'TFIGRB is"a'=part|al'-sectionalview taken substantially along the line VIII --VIII otFIGslwith parts broken away forclarity of the a motor case of' the invention showing its engagement with'thedrivingscrew shaft elements; and

FIG!!! is a perspectivewview of the rnotor case. of theinven- I 'tion showingthedisposition 'of air: nozzles for :cleaning-pur- 'poses.

DESCRIPTION OF'THE-PREFERRED EMBODIMENT Referring more. particularly: to' the drawing, reference nu- "meral 2: designates generallythe elongated'housing of the invention whichhasa substantially open front face '4, solid sides 6 and a perforate rear side 8sA pair of notches I0 is formed on the rear side8 whereby the housing can bemanipulated by the The affixed to the inner part of the door frame.

'ends of the housing 2 are covered by plates 12. The end plates lengths of both sides 6. g j A-motor case 16 whieh'is in the shape of a cup having a substantially closed end -l8=and an open end 20 surround by a rectangularflange 22,as best shownin FIG. 7, is snugly but slidably .fitted-inthe housing 2'with its open end 20 facing outwardly of the open face 4 of the housing. Opposite sides 24 of the flange 22 are fitted inwthe recesses 14 and are retained therein by means of gibs 26 which are bolted to the side walls t5. A two-pieee-cylindrical shroud 28 is slidably fitted within the motor case 16 and restrained from rotational movement therein by means of a key 30. Anhydraulically powered motor 32 is disposed withinthe shroud 28 with its shaft 34 projecting therefrom out oftheopen face 4 of the housing 2. A collar 36 is keyed to the shaft 34 by means of-a key 38, and a cutter blade 40having throw away type carbide inserts 42 spaced around the periphery thereof is attached to the collar 36by means of bolts 44. The motor 32 is fixedly secured withinthe shroud 28 by means of bolts 46.

The-motor and shroud are adjustable as a unit inwardly arid outwardly of the motor case 16 and open face 4 of the housing 2 by means of screw- 48. The head 50 of the screw 48 is disposed in a pocket-52 formed in a retaining collar 53 which in turn is disposed between the motor and the: side of the shroud remote from the cutter blade 40. The retaining collar is heldin position by means of twoof the bolts 46. The body or shaft 54 of the screw is threaded through an internally threaded sleeve 56 which is disposed in the bottom wall 18 of motor 32 to the motor case 16.

The movement of the cutting head unit, made up of the .motorcase '16, shroud '28, and cutter blade 40, from one end to the other of the housing shaft 2 is accomplished by means of .a pair of screw shafts 64 and-64a, The power for rotating the screwshafts-64 and-64a is supplied by an hydraulic motor-66.

The motor 66ismounted on one of the end plates 12 with its shaft projecting therethrough to aconnection with the screw =shaft 64. The other screw shaft64a is driven by a chain and sprocket 96 68 with a drive sprocket 70 on screw shaft 64. It

will be noted that, if desired, the rotation of screw shaft 64 .eouldbe transferred to screwshaft64a by means of a gearrrain coupling, or separate motors could be provided for driving each of the screw shafts independently. The ends of the shafts 64 and 64a remote-from the motor 66 are joumaled in bearings 72 mounted in the end plate 12 opposite the motor 66.-Driving action of the screwshafts-64 and 64a istransferred to the *motor caserl6ibytmeansof two internally threaded nuts 74 which are welded or otherwise'fixedly attached in tangential :fashionon the motor case-l6, as best shown in FIG. 8. It will i be understood that motor ease-l6 can be case with the nut 74 forming-an 'integral part thereof, if desired. As best shown in *FIGS.-4 andi5,'the screw-shafts 64 and 64a pass through elongated-slots'76 in 'the top and bottom of the shroud 28 so that s the screw shafts will not interfere with the adjusting movement of the shroud and motor unit relative to the motor case 16. -A pair of latches, designated generally by reference numeral 178, isprovided on each of the sidewall 6 of the housing 2 for securing the housing in position when it is moved into a coke :oven door framesEach of the Iatches78 includes a pneumatic cylinder 80, a bolt '82, which is attached to the piston rod of :the cylinder, and a guide 84 which guides the movement of uthe'bolt82; When the housing '2 is placed within a coke oven door frame, as shown in FIG.- 6, the cylinders 80 are actuated qto project the bolts82- through the guides 84 into a catch 85 Positioning stubs 86 project from each of the four corners of the open face 4 of the housing 2. The positioning stubs 86 insure the provision of sufficient space between the inside of the door frame and the housing 2 for the cutter blade 40 to rotate.

If desired, air manifolds 88 and 90 may be provided on the outer surfaces of the motor case 16. Each of the air manifolds is provided with a plurality of air nozzle openings for directing air under pressure to blow chips away from the screw shafts 64 and 64a and the cutter blade 40.

Hydraulic fluid under pressure may be supplied to the motor 32 by means of a conventional fluid conduit connected with a suitable pump and circulating apparatus (not shown). The motor 66 which rotates shafts 64 and 64a likewise be cone connected to a conventional pump and hydraulic control system (not shown).

In operation, when it becomes necessary or desirable to machine the door jambs 94 of a coke oven door frame. a hear heat shield 96 is placed inwardly of the door frame of the coke oven after the door has been removed therefrom so as to seal off the heat from the coke oven during the subsequent machine operation. Then the conventional coke oven doorextracting machine (not shown) is used to pickup the housing 2 from a rack (not shown) on which it normally rests between machining operations and carry it to and place it in operating position in the coke oven door frame with the open face 4 of the frame and the cutter blade 40 facing inwardly of the coke oven with the carbide inserts 42 on the periphery of the cutter blade in engagement with the door jambs 94, as best shown in FIG. 6.

The cylinders 80 are then actuated to project the bolts 82 to lock the apparatus in operating position. The depth of cut desired, depending on the amount of bow in the door jambs, is set by loosening lock nut 60 and rotating the screw 48 to move the shroud and motor unit inwardly or outwardly of the motor case 16. Motors 32 and 66 are then actuated to rotate the cutter blade 40 and turn the screw shafts 64 and 64 a, respectively, so as to cause the cutter blade to rotate and the cutter unit to travel longitudinally of the door jambs 94.

I claim:

1. Apparatus for machining the jambs of coke oven door frames comprising an elongated housing having one substantially open side extending longitudinally therealong, said housing adapted to be positioned with its open side closely adjacent a coke oven door frame when the door has been removed therefrom, a motor case snugly fitting in the housing for sliding movement longitudinally thereof, means for driving the case along the housing, a motor mounted in said case. and a rotary cutter connected with and driven by said motor. said cutter projecting outwardly of the open side of said housing and being adapted to engage with its periphery the spaced jambs of the door frame adjacent with said housing is positioned.

2. Apparatus as defined by claim 1 in which said case-driving means include a screw shaft joumaled in and extending longitudinally of said housing. motor means connected with said shaft for rotating the same, said case being threadingly engaged on said shaft.

3. Apparatus as defined by claim 1 including a shroud surrounding the motor in said case, means securing said motor to said shroud, and means connected with said casing and said shroud for adjustably moving said shroud and motor inwardly and outwardly of said housing normal to the longitudinal axis thereof.

4. Apparatus as defined by claim 3 in which said means for adjustably moving said shroud and motor includes a screw having its head disposed for rotation in said shroud. an internally threaded sleeve rigid in said motor case threadingly surrounding the body of said screw, said shroud being adjustably movable inwardly and outwardly of said motor case upon rotation of said screw, and a lock nut threaded on said screw adjacent said sleeve whereby said screw is locked when said shroud is in adjusted osition.

5. Apparatus as de med by claim 1 including latching means on opposite lateral surfaces of said housing adapted to engage said door frame when said housing is positioned closely adjacent thereto.

6. Apparatus as defined by claim 1 including spacer members projecting from said housing adjacent the open side thereof adapted to engage said door frame to thereby limit the distance of penetration thereinto by said housing. 

1. Apparatus for machining the jambs of coke oven door frames comprising an elongated housing having one substantially open side extending longitudinally therealong, said housing adapted to be positioned with its open side closely adjacent a coke oven door frame when the door has been removed therefrom, a motor case snugly fitting in the housing for sliding movement longitudinally thereof, means for driving the case along the housing, a motor mounted in said case, and a rotary cutter connected with and driven by said motor, said cutter projecting outwardly of the open side of said housing and being adapted to engage with its periphery the spaced jambs of the door frame adjacent with said housing is positioned.
 2. Apparatus as defined by claim 1 in which said case-driving means include a screw shaft journaled in and extending longitudinally of said housing, motor means connected with said shaft for rotating the same, said case being threadingly engaged on said shaft.
 3. Apparatus as defined by claim 1 including a shroud surrounding the motor in said case, means securing said motor to said shroud, and means connected with said casing and said shroud for adjustably moving said shroud and motor inwardly and outwardly of said housing normal to the longitudinal axis thereof.
 4. Apparatus as defined by claim 3 in which said means for adjustably moving said shroud and motor includes a screw having its head disposed for rotation in said shroud, an internally threaded sleeve rigid in said motor case threadingly surrounding the body of said screw, said shroud being adjustably movable inwardly and outwardly of said motor case upon rotation of said screw, and a lock nut threaded on said screw adjacent said sleeve whereby said screw is locked when said shroud is in adjusted position.
 5. Apparatus as defined by claim 1 including latching means on opposite lateral surfaces of said housing adapted to engage said door frame when said housing is positioned closely adjacent thereto.
 6. Apparatus as defined by claim 1 including spacer members projecting from said housing adjacent the open side thereof adapted to engage said door frame to thereby limit the distance of penetration thereinto by said housing. 